I did this back in the summer and didn't take pictures of the process, but took a few this morning. Just thought I'd share. I believe the kit my wife got off ebay was about 150 bucks. Not bad I don't think.
http://www.vehicross.info/gallery/data/500/CIMG6132.JPG
This pic shows how the screen hangs on top of the factory mirror. It's held on by two tie wraps and also has tabs on top and bottom to help locate it properly.
http://www.vehicross.info/gallery/data/500/CIMG6134.JPG
This pic shows the camera in the stock location. It's hardly noticeable.
http://www.vehicross.info/gallery/data/500/CIMG6136.JPG